19 Building materials formed from plastics including recycled plastics and plastics based on renewable resources, namely, plastic tiles, plastic wallboards, plastic floorboards, plastic building boards, plastic landscape edgings, plastic conduits for drainage and irrigation, plastic boundary marking posts, plastic security windows allowing communication, plastic water conduits for roofs and balconies, plastic pipe supports, composite lumber made of recycled plastic, plastic road studs for marking out roads, plastic oil and debris traps for storm drainage, plastic posts with reflective UV coated discs attached, plastic support pads for piers for manufactured home, plastic pedestals for elevating pavers, multilayer panels of plastic for use in building, modular plastic decking to serve as a ground cover, crash barriers of plastic for roads, plastic reinforced wall panels for use as sound and light barriers, plastic webbing used to reinforce bituminous waterproofing sheets, non-metal barricades comprised of plastic, non-metal floors comprised primarily of plastic, plastic extrusions, namely, decking, each of the above being plastics made of styrene polymers or styrene copolymers including acrylonitrile-butadiene-styrene-, styrene-acrylonitrile-, alpha-methyl styrene-acrylonitrile-, styrene-methyl methacrylate-, methyl methacrylate-acrylonitrile-butadiene-styrene-, methyl methacrylate butadiene-styrene-, styrene-butadiene-, acrylonitrile-styrene-acrylate-, styrene-maleic anhydride-copolymers, and plastics made of blends of styrene polymers or copolymers with other thermoplastic resins